About The Role

# Competitive Programming Expert - Freelance AI Trainer

> Mindrift · Israel (Remote) · Part-time · Posted 2026-08-26

**Workplace:** remote

**Department:** Competitive Programming

## Description

_Please submit your CV in English and indicate your level of English proficiency._

Mindrift connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. **Participation is project-based, not permanent employment.**

**What this opportunity involves**

We're building competitive-programming problems and their automatic graders (test cases + checkers) used to train advanced AI coding models. You'll create problems, write both correct and deliberately-wrong solutions, and design the tough test cases that catch subtly-broken code. Your work is what makes the training signal trustworthy.

To apply, share: your competitive-programming handle(s) + current/peak rating, any problem-setting experience, and IOI/ICPC/olympiad history.

**What you'll do**

Write original algorithmic problems — clear statement, sound constraints, an intended solution;
Write correct solutions in C++ and Python;
Write realistic wrong solutions (common mistakes) to test against;
Build and harden test cases: generators, edge cases, stress and "hacking" tests;
Write checkers/interactors (testlib) for problems with more than one valid answer;
Confirm the quality bar: correct solutions pass, wrong ones fail, within time limits.

**What we look for**

Strong competitive programming background, shown by a public profile — a Codeforces rating (see levels below), OR an IOI / ICPC / national-olympiad record;
Fluent contest C++ (STL, complexity); comfortable writing Python;
Can explain why a solution is wrong and build an input that breaks it;
Strong written English (C1+).

Levels (by Codeforces rating, or equivalent olympiad achievement)

_Associate_ — 1700–2100 (Expert / Candidate Master): easier problems;
_Expert_ — 2200–2600 (Master / Grandmaster): harder problems
_Senior / Reviewer_ — 2600+ (Int'l Grandmaster) or IOI/ICPC medalist: hardest problems + quality review.

**Nice to have**

IOI / ICPC alumni and top competitive programmers especially encouraged to apply;
Experience setting or testing problems for real contests (Codeforces rounds, ICPC, national olympiads, online judges);
Testlib experience (checkers, validators, generators);
Experience creating data for LLM code benchmarks or similar RL / evaluation datasets.

**How it works**

Apply → Pass qualification(s) → Join a project → Complete tasks → Get paid

**Project time expectations**

For this project, tasks are estimated to require around 10-20 hours per week during active phases, based on project requirements. This is an estimate, not a guaranteed workload, and applies only while the project is active. Tasks must be submitted by the deadline and meet the listed acceptance criteria to be accepted.

**Compensation**

Paid per accepted task. Your rate depends on the qualification tier you reach and how efficiently you complete tasks — up to the equivalent of **$90/hr**. Because payment is per task, a faster pace raises your effective hourly rate.

## Apply

[Apply at Mindrift](https://apply.workable.com/toloka-ai/j/C8FF7B79B5/apply)

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